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Hitch — object-dependent

Timber Hitch

Friction on hardware · Physical hitch theory

DiagramsHow to tie it

Does not pick a knot

This page does not pick a knot for you. DNA, molecules, quantum braids and vortices stay off Decide.

Timber Hitch, finishedTimber Hitch, finished

Finished structure

Drawn from a rope model of this knot: which strand passes over which comes from where the rope actually lies.

Failure modes

When this family fails, it fails as these. The recovered end still outranks the name.

Bind / drag family

A binding that holds two parts, or a hitch that tightens as you drag.

  • !Reef knot used as a bend — it spills
  • !Granny form (both tucks the same way)
  • !Timber hitch with too few wraps on the object, so it walks
Fails when
  • !The pull comes off, so the hitch loosens and can drop off the spar
  • !The end is twisted around the standing part, or only once, so it slides out when pulled
  • !The twists are not pressed against the spar, so the end is not trapped and works free under load
  • !A spar hoisted or towed lengthwise has no half hitch, so it twists out of line with the pull
Geometry

  • Too few dogged tucks

    Walks as soon as the spar turns

    Three or more tucks are the hitch · step 02

  • Loose dogs never dressed

    Dumps under the first hoist

    The tucks must bite the standing part · step 03

  • Expected to hold slack, or used as a chain snubber

    Collapses the moment the load comes off

    This hitch holds under tension only; a standing transfer is rolling or icicle · step 04

If you saw this

  • Hitch dumps when the load comes off, or walks while hoisting

    Check

    • ?Three or more dogged tucks
    • ?Load on the standing part

    Then

    • →Add tucks
    • →Keep it loaded
    • →Use rolling or icicle for a standing transfer

  • Too few dogged tucks

    Check

    • ?Walks as soon as the spar turns
    • ?Inspect step 02

    Then

    • →Retie. Do not dress a defective structure and call it seated.

  • Loose dogs never dressed

    Check

    • ?Dumps under the first hoist
    • ?Inspect step 03

    Then

    • →Retie. Do not dress a defective structure and call it seated.

  • Expected to hold slack, or used as a chain snubber

    Check

    • ?Collapses the moment the load comes off
    • ?Inspect step 04

    Then

    • →Retie. Do not dress a defective structure and call it seated.
Same family

Same failure class, different geometry. Open the plates — Diagnose still starts from the symptom.

This failed — start Diagnose

What holds it

  • ·A hitch is object-dependent. Remove the spar, cleat, ring or pile and the structure is usually the unknot.
  • ·Bayman / Maddocks–Keller describe a no-slip regime from wrap count and friction. The prediction is approximate, and only for hitches.

What topology does not predict

  • ·Closed-loop knot invariants (Jones, Alexander) do not say whether a clove hitch will walk on a smooth spar.
  • ·No manufacturer working load is implied by wrap count.
  • ·Wet, iced, or HMPE covers change friction — topology is silent.

Not for

  • ·Joining two free rope ends — that is a bend
  • ·A standing loop that must survive after the object is gone
  • ·A standing attachment that must hold slack
  • ·A slick snubber on chain (rolling or icicle)

Same pattern, different job

No sourced twin among these knots. Related knots stay on the Library card.

Sources